The estimated resident population (ERP) for South Australia was 1,629,500 at 30 September 2009, an increase of about 20,900 persons (1.3%) since 30 September 2008. Nationally, the ERP was 22,065,700 at 30 September 2009, an increase of about 451,900 persons (2.1%) since 30 September 2008.

For the year ended 30 September 2009, South Australia recorded a natural increase (i.e. the net of births and deaths) of 7,076 persons. Net overseas migration provided a gain of 17,732 persons in the same period while net interstate migration realised a loss of 3,952 persons.

For the year ended 30 September 2009, Australia recorded a natural increase in population of 154,507 persons; net overseas migration resulted in a gain of 297,369 people.